Sandvik Coromant Threading - Manual (Page 27)

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2. Applications – Thread turning
Selecting shims to tilt the insert for fl ank clearance
Insert shims are used to give different tilts to the insert, so that
the angle of insert inclination is the same as the helix of the
thread. See table opposite for methods of selecting the correct
insert shim.
• The standard shim in the holder is 1°, the most common angle of
inclination
• Shims are available in 1° steps, in the range -2° to 4°
• Negative-inclination shims are required when turning left-hand
threads with right-hand tools, and vice versa
=
the angle of insert
inclination
The fl ank clearance angle of the insert is adjusted by changing
the shim under the insert in the tool holder. Standard tool hold-
ers have a 1° insert inclination angle.